I can just about remember my first Adwords campaign. It was for my own business and I was spending my own money.

In my opinion, this is the best way to learn the platform - there is no better motivation to learn the subtleties (and not so subtle pitfalls) than knowing that every wasted click is money straight out of your own pocket.

In fact, for everyone wondering how best to learn AdWords, I would always suggest they look to get some skin in the game.

Looking back, I now realise how green I was and how much money I probably wasted, but that is not the theme of today's article.

Instead, today, I am considering the way in which the KPI's change over time as your Adwords knowledge develops.